* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.main {
    display: -webkit-flex;
    /* Safari */
    display: flex;
    width: 100%;
    height: 100vw;
    flex-wrap: wrap;
}

.col {
    width: 30.6%;
    height: 30.6%;
    background-color: #f7913e;
    margin-left: 2%;
    margin-top: 2%;
    border-radius: 8%;
}

.num3 {
    width: 30.6%;
    height: 30.6%;
    background-color: #f7913e;
    /* margin-left:2%; */
    margin-top: 2%;
    border-radius: 8%;
}